Zyda-2: a 5 Trillion Token High-Quality Dataset
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Abstract (arXiv)
In this technical report, we present Zyda-2: a five trillion token dataset for language model pretraining. Zyda-2 was used to train our Zamba2 series of models which are state-of-the-art for their weight class. We build Zyda-2 by collating high-quality open-source tokens such as FineWeb and DCLM, then distilling them to the highest-quality subset via cross-deduplication and model-based quality filtering. Zyda-2 is released under a permissive open license, and is available at https://huggingface.co/datasets/Zyphra/Zyda-2
Key facts. Cited by 13 papers in the map (data through 14 Oct 2026). Builds on 18 of its 19 references that are in the map. First posted on arXiv 9 Nov 2024.
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18 of 19 references.
References · 18
- 2020Language Models are Few-Shot Learnerscited by 32,419
- 2019Exploring the Limits of Transfer Learning with a Unified Text-to-Text Transformercited by 14,599
- 2020The Pile: An 800GB Dataset of Diverse Text for Language Modelingcited by 2,411
- 2024Phi-3 Technical Report: A Highly Capable Language Model Locally on Your Phonecited by 1,917
- 2024The FineWeb Datasets: Decanting the Web for the Finest Text Data at Scalecited by 1,160
- 2024Gemma: Open Models Based on Gemini Research and Technologycited by 916
- 2023The RefinedWeb Dataset for Falcon LLM: Outperforming Curated Corpora with Web Data, and Web Data Onlycited by 763
- 2024MiniCPM: Unveiling the Potential of Small Language Models with Scalable Training Strategiescited by 723
- 2021Deduplicating Training Data Makes Language Models Bettercited by 714
- 2024Dolma: an Open Corpus of Three Trillion Tokens for Language Model Pretraining Researchcited by 483
- 2024DataComp-LM: In search of the next generation of training sets for language modelscited by 398
- 2024Rephrasing the Web: A Recipe for Compute and Data-Efficient Language Modelingcited by 161
6 more
- 2024Zamba: A Compact 7B SSM Hybrid Modelcited by 124
- 2024Perplexed by Perplexity: Perplexity-Based Data Pruning With Small Reference Modelscited by 84
- 2024Does your data spark joy? Performance gains from domain upsampling at the end of trainingcited by 52
- 2024BlackMamba: Mixture of Experts for State-Space Modelscited by 37
- 2024Nemotron-4 15B Technical Reportcited by 36
- 2024Zyda: A 1.3T Dataset for Open Language Modelingcited by 3
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Citing papers per year: 2024: 1; 2025: 8; 2026: 4.
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- 2024Nemotron-CC: Transforming Common Crawl into a Refined Long-Horizon Pretraining Datasetcited by 160
- 2025MegaMath: Pushing the Limits of Open Math Corporacited by 51
- 2025Nemotron-CC-Math: A 133 Billion-Token-Scale High Quality Math Pretraining Datasetcited by 38
- 2025Language Models Improve When Pretraining Data Matches Target Taskscited by 19
- 2025Nemotron-Flash: Towards Latency-Optimal Hybrid Small Language Modelscited by 15
- 2025MoNE: Replacing Redundant Experts with Lightweight Novices for Structured Pruning of MoEcited by 13
- 2025Datasets, Documents, and Repetitions: The Practicalities of Unequal Data Qualitycited by 8
- 2025GneissWeb: Preparing High Quality Data for LLMs at Scalecited by 7
- 2025A Partition Cover Approach to Tokenizationcited by 5
- 2026Tokenizer-Agnostic Engram Modulecited by 1
- 2026Scaling Inherently Interpretable Language Modelscited by 1
- 2026Scaling Adaptive Depth with Norm-Agnostic Residual Networkscited by 0
1 more
- 2026Scaling Inherently Interpretable Language Models6 Aug 2026
- 2026Tokenizer-Agnostic Engram Module31 Jul 2026
- 2026FlexMoE: One-for-All Nested Intra-Expert Pruning for MoE Language Models26 Jun 2026
- 2026Scaling Adaptive Depth with Norm-Agnostic Residual Networks15 Jun 2026
- 2025Nemotron-Flash: Towards Latency-Optimal Hybrid Small Language Models24 Nov 2025
- 2025Nemotron-CC-Math: A 133 Billion-Token-Scale High Quality Math Pretraining Dataset20 Aug 2025
- 2025Language Models Improve When Pretraining Data Matches Target Tasks16 Jul 2025
- 2025MoNE: Replacing Redundant Experts with Lightweight Novices for Structured Pruning of MoE1 Jul 2025
- 2025MegaMath: Pushing the Limits of Open Math Corpora3 Apr 2025
- 2025Datasets, Documents, and Repetitions: The Practicalities of Unequal Data Quality10 Mar 2025
- 2025GneissWeb: Preparing High Quality Data for LLMs at Scale19 Feb 2025
- 2025A Partition Cover Approach to Tokenization8 Jan 2025
- 2026Scaling Inherently Interpretable Language Modelscited by 1
- 2026Scaling Inherently Interpretable Language Models6 Aug 2026
- 2024Nemotron-CC: Transforming Common Crawl into a Refined Long-Horizon Pretraining Datasetcited by 160
- 2025Language Models Improve When Pretraining Data Matches Target Taskscited by 19
- 2025Nemotron-Flash: Towards Latency-Optimal Hybrid Small Language Modelscited by 15
- 2025Datasets, Documents, and Repetitions: The Practicalities of Unequal Data Qualitycited by 8
- 2025GneissWeb: Preparing High Quality Data for LLMs at Scalecited by 7
- 2025A Partition Cover Approach to Tokenizationcited by 5
- 2026Tokenizer-Agnostic Engram Modulecited by 1
- 2026Scaling Adaptive Depth with Norm-Agnostic Residual Networkscited by 0
- 2026Tokenizer-Agnostic Engram Module31 Jul 2026
- 2026Scaling Adaptive Depth with Norm-Agnostic Residual Networks15 Jun 2026
- 2025Nemotron-Flash: Towards Latency-Optimal Hybrid Small Language Models24 Nov 2025
- 2025Language Models Improve When Pretraining Data Matches Target Tasks16 Jul 2025
- 2025Datasets, Documents, and Repetitions: The Practicalities of Unequal Data Quality10 Mar 2025
- 2025GneissWeb: Preparing High Quality Data for LLMs at Scale19 Feb 2025
- 2025A Partition Cover Approach to Tokenization8 Jan 2025
- 2024Nemotron-CC: Transforming Common Crawl into a Refined Long-Horizon Pretraining Dataset3 Dec 2024